2003 BMW Z4 Engine Cooling Parts

This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit and function of the original part.

Product Features:

• Direct replacement – this engine coolant reservoir matches the fit and function of the original part
• Ideal solution – engineered for a seamless installation
• Durable construction – manufactured from quality materials to withstand underhood heat and vibration
• Trustworthy design – backed by 100 years of automotive aftermarket experience

Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:

• Thermal tested under real-life temperature simulations
• High tensile strength aluminum for maximum crimp strength
• Plastic tanks are engineered with integrated ribbing for added strength to withstand cracks, bowing and distortion during thermal cycles
• Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.

Product Features:

• Meets or exceeds all original equipment specifications
• Application specific design to ensure a perfect fit
• Engineered and manufactured specifically for the repair environment
• Unsurpassed quality you can trust
• Validated for fit, form, and function

High quality OE replacement part with all components needed to complete the job.

Product Features:

• Meets and/or exceeds OEM standard
• Includes quality gasket or O-ring  to ensure proper seal (where applicable)
• Includes quality gasket or O-ringá to ensure proper seal (where applicable)
• Coated with corrosion and rust inhibitor
• 100% leak tested
• All-in-one bolt on solution for a complete repair
• Includes quality thermostat
• Meets and/or exceeds OEM standard
• Includes quality gasket or O-ring to ensure proper seal (where applicable)
• Coated with corrosion and rust inhibitor
• 100% leak tested
• All-in-one bolt on solution for a complete repair

MAHLE® gaskets provide world class sealing products trusted by OEMs & Technicians around the globe.

Product Features:

• All MAHLE gaskets meet or exceed the original equipment specifications providing the finest sealing products available
• MAHLE gaskets utilizes OE equivalent or better materials in all our gaskets
• MAHLE gaskets is the leader in Domestic, Asian and European applications
• The contents of MAHLE gaskets are packaged in shrink wrapped tray, giving you the added security of knowing that you have the right parts, prior to opening the package

Rein Automotive OE Quality expansion tank caps are designed to be direct replacements for OE caps. Rein caps are designed to match or exceed the OE materials used and are produced to the highest standards to ensure long service life. Rein Automotive OE quality expansion tank caps keep the coolant system at the proper pressure just like the OE cap.

Product Features:

• Manufactured to strict engineering standards/specifications in materials and tolerances.
• Direct fit.
• Meets or exceeds pressure specifications demanded by the OE manufacturer.
• Produced by an original equipment supplier.

Damaged your engine water pump pulley? This pulley is a direct replacement for the original manufacturer’s part on specific vehicle years, makes and models, restoring proper performance.

Product Features:

• Direct replacement – this engine water pump pulley matches the fit and function of the original part on specific vehicles
• Durable design – built to withstand the elements and road debris
• Thoroughly tested – must pass strict standards to ensure reliable longevity
• Trustworthy quality – backed by team of engineers and inspectors in United States

The Automatic Transmission Oil Cooler Thermostat is designed to control the flow of fluid to the transmission oil cooler in order to keep the transmission fluid at optimal operating temperature.

Product Features:

• Application matched component to ensure the system can be returned to like new condition.
• Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.

Rein Automotive OE quality coolant pipes fit European vehicles the way the original manufacturer intended. Designed to be a direct replacements for the OE coolant, Rein coolant pipes are identical to the OEM.

Product Features:

• Designed as direct-fit replacements to ensure trouble-free proper installation.
• Made to strict engineering quality standards.
• Part is produced using only the highest quality materials.
• Resistant to heat, salt, road debris, oil and other contaminants.

With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:

• Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.

Water Pipe

On certain BMW, Mini, Chrysler, Dodge, Jeep, and Ram vehicles, the original equipment engine coolant bleeder screw is made of plastic. Over time and during normal service, the head of the plastic screw deforms, becomes difficult to turn, and inevitably requires replacement. This Dorman OE FIX coolant air bleeder screw is made of brass to resist deforming during service, saving the expense of replacing the original screw with the same failure-prone plastic design.

Product Features:

• Upgraded material – this brass coolant air bleeder screw reduces future maintenance costs by replacing the original equipment plastic screw on specified BMW, Mini, Chrysler, Dodge, Jeep, and Ram vehicles
• Ideal solution – instead of wasting time wrestling with a deformed plastic screw head, this sturdy brass screw ensures easy, reliable removal and reuse
• Durable construction – made of quality brass for reliable performance and long service life
• Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:

• Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.

Screw

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

• Economy adjustable thermostatic fan control
• Economy Model; 32-248 Deg. F
• For use with Imperial electric fans
• Probe installs into radiator fins
• Contains gaskets, O-rings, or seals to properly replace the product
• Brass construction for accurate temperature sensing
• Zinc coated terminal to resist corrosion
• Vehicle specific applications

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

• Adjustable thermostatic fan control
• 160 Deg. F – 210 Deg. F thread-in probe
• For use with Imperial electric fans
• Thread-in probe for installation in water jacket or radiator
• Contains gaskets, O-rings, or seals to properly replace the product
• Brass construction for accurate temperature sensing
• Zinc coated terminal to resist corrosion
• Vehicle specific applications

Carquest Premium Integrated Housing Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This integrated thermostat housing will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant as well as the design and function of the housing. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:

• High grade stainless steel and copper construction
• Meets or exceeds OEM standards
• Consistent and precise response to cooling system needs
• Original equipment design for worry-free direct fit replacement
• 100% tested and calibrated

Manufactured with OEM quality materials and safety standards by an OE Supplier. This integrated thermostat housing will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant as well as the design and function of the housing. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:

• High grade stainless steel and copper construction
• Meets or exceeds OEM standards
• Consistent and precise response to cooling system needs
• Original equipment design for worry-free direct fit replacement
• 100% tested and calibrated

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

• Rapid-Cool Thin-Line electric fans
• 10″ Diameter
• 650 CFM
• Use as a pusher or puller fan
• Motors built and tested to quality specifications
• 10 in. universal fit reversible fan
• 650 CFM
• UNIVERSAL fan, NOT a direct OE replacement. Measure core and verify space.

The engine cooling system is critical to engine sustainability under all operating conditions. The Coolant Level Sensor reports the level of coolant either in the radiator overflow container or in the radiator tank.

Product Features:

• Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
• Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the part design process ensures speed-to-market and a precise fit guaranteed.
• Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
• 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
• 100% end-of-line tested to ensure accurate signal output providing product reliability, every time.

Delphi’s history is one of OE heritage and quality. Our global technical requirements include design specifications and validation testing based on over 100 years of OE experience. Our material selections, material thickness, and material types are built from OE specifications to exceed aftermarket expectations. We put in place strict manufacturing processes to ensure quality control in every part we make. Delphi’s pioneering spirit delivers innovative solutions designed to support the aftermarket in servicing the vehicles of today, and tomorrow.

Product Features:

• Delphi temperature sensors deliver accurate readings and optimal performance
• Delphi’s one-piece design and automated production process eliminates internal connectors and failure points
• Each sensor is electrically insulated to eliminate interference from other components in the vehicle
• Delphi temperature sensors are impervious to electrical noise and interference

The Engine Coolant Temperature Sensor determines the exact temperature of the engine coolant by sending an analog signal to the ECM to ensure proper air/fuel ratio along with proper operation of the cooling fans and temperature gauge. The Engine Coolant Temperature Sensor may be located on the cylinder head, engine block, thermostat housing or intake manifold. Reasons for replacement include, check engine light illumination, erratic or no temperature gauge operation, erratic or no cooling fan operation, and engine overheating.

Product Features:

• OE MATCHED: Wires and probe length match OE. Mounting clips included where applicable
• FASTER RESPONSE TIME: Thermal conductive grease inside brass housing increases sensor response time
• THE DIFFERENCE: Thread sealant/o-ring installed where applicable. Thermistor placement within the housing matches OE to ensure proper output. Proper thermal conductive grease to provide accurate temperature transfer to the thermistor

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

• Rapid-Cool Thin-Line electric fans
• 12″ Diameter
• 800 CFM
• Use as a pusher or puller fan
• Motors built and tested to quality specifications
• 12 in. universal fit reversible fan
• 800 CFM
• UNIVERSAL fan, NOT a direct OE replacement. Measure core and verify space.

This engine cooling fan assembly is precision-engineered to match the fit and performance of the stock radiator fan on specific vehicle years, makes and models. It has been rigorously tested to ensure it cools as effectively as the original part.

Product Features:

• Ideal replacement – this engine cooling fan assembly was precision-engineered to match the fit and performance of the stock radiator fan assembly on specific vehicles
• Complete package – assembly is designed with the same materials and components as the original part
• Quality assured – motors are tested in laboratory settings to ensure performance
• Cost effective and reliable – trustworthy manufacturing for far less than same part at the dealership

Beck/Arnley parts meet foreign nameplate OE specifications for form, fit and function. Our product specialists work with a network of global sourcing partners so you can install the right part with confidence.

Product Features:

• Matches OE form, fit and function
• Heavy duty bearings, sealed and lubed for life
• Includes all necessary gaskets and seals needed for a complete installation
• Where applicable, metal and resin impellers are offered. See catalog to match pump to this vehicle
• Be sure to use the proper coolant to maximize cooling system components. See Beck/Arnley catalog for the coolant for this application.

The plastic cover on certain BMW engine water pumps is known to crack over time and cause the pump to leak coolant. If you need to replace your pump, you don’t want to run the risk of it failing that way in the future. This Dorman OE FIX solution upgrades the pump housing and hardware to robust aluminum to help extend service life. It also has an updated circuit board design that increases reliability. This improved replacement has undergone rigorous laboratory and on-vehicle road testing, proving it matches OEM performance.

Product Features:

• Upgraded replacement – this water pump features a more robust aluminum housing, improving on the crack-prone plastic design that comes stock on certain BMW vehicles
• Enhanced electronics – features an updated printed circuit board (PCB), with purposefully designed circuits, that seamlessly integrates with the factory engine control module
• Rigorously tested – laboratory and on-vehicle road testing includes validation of dimensions, connector fitment, flow rates and thermal shock durability
• Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

This new pump is 100% tested to ensure the highest quality. Each unit is built to meet or exceed all OE specifications and is validated for fit, form, and function. Application specific design to ensure a perfect fit and correct operation for unsurpassed quality.

Product Features:

• All components necessary for installation are supplied with pump
• Follow all enclosed instructions to maximize pump life and validate warranty
• Specialized for vehicles using supplemented cooling for the engine or components
• Plastic housing

VDO now offers an Electric Water Pump with an integrated Control Unit. VDOs Electric Water Pump is the exact OEM part and manufactured to the highest quality and original equipment specifications. It is identical in fit, form, and function and provides the exact quality of OE components supplied to auto manufacturers worldwide. Professional technicians and DIYers alike want quality products for ease of installation, fit, and performance. Our water pump is built in OE ISO TS certified facilities and manufactured to the highest quality standards. VDO also supplies separately the mounting screws associated with installation of our water pump. The Electric Water Pump is mounted with 3 screws. Please refer to OE application and guidelines for screw selection as three variants exist. With VDO you can count on dependable performance and robust design by being original equipment while still maintaining a competitive price.

Product Features:

• Precise engine temperature control through variation of coolant volume flow
• Use of energy meeting the demands
• Operation independent from main cooling circuit and combustion engine operation
• Vehicle Specific fit and function
• Made in ISO certified facilities OEM Product